the difference between two whole numbers is 15.one of the numbers is 1.there are two possibilities for the second number. what are they?

2 answers

16, -16.

16-1 = 15
| 1-16 | = 15
place 1 on its place on a number line, now count 15 to the right, then 15 to the left

I get 16 with1 and -14 with 1

how far from 1 to 16 ?
how far from -14 to 1 ?